2018 MERCEDES-BENZ GLS refrigerant type

Power washer ................................ 331
Rear view camera .......................... 334
Roof lining ...................................... 337
Seat belt ....................................... .3 36
Seat cover ..................................... 336
Sensors ......................................... 334
Side running board ........................ 334
Steering wheel ............................... 336
Trim pieces ................................... .3 36
Washing by hand ........................... 331
Wheels .......................................... .3 33
Windows ........................................ 333
Wiper blades .................................. 333
Wooden trim .................................. 336
Cargo compartment cover
Notes/how to use ......................... 306
Cargo compartment enlargement
Important safety notes .................. 303
Cargo compartment floor
Important safety notes .................. 307
Opening/closing ............................ 307
Stowage well (under) ..................... 307
Cargo tie down rings ......................... 305
CD
see also Digital Operator's Man-
ual ................................................. .2 92
CD player (on-board computer) ....... .2 39
Center console
Lower section .................................. 40
Upper section .................................. 39
Central locking
Automatic locking (on-board com-
puter) ............................................. 244
Locking/unlocking (SmartKey) ....... .7 7
Child
Restraint system .............................. 61
Child seat
Forward-facing restraint system ...... 64
LATCH-type (ISOFIX) child seat
anchors ............................................ 62
On the front-passenger seat ............ 64
Rearward-facing res train t system .... 64
Top Tether ...................................... .6 3
Child-proof locks
Important safety notes .................... 64
Rear doors ...................................... .6 5
Children
Special seat belt retractor .............. .6 0 Children in the vehicle
Important safety notes .................... 59
Cigarette lighter ................................ 312
Cleaning
Mirror turn signal .......................... .3 34
Trailer tow hitch ............................ .3 35
Climate control
3-zone automatic climate control
with additional rear-compartment
climate control ............................... 129
Automatic climate control (3-
zone) .............................................. 127
Controlling automatically .............. .1 32
Cooling with air dehumidification .. 131
Defrosting the windows ................. 134
Defrosting the windshield .............. 133
Dual-zone automatic climate con-
trol ................................................. 125
General notes ................................ 125
Indicator lamp ................................ 132
Ionization ....................................... 135
Maximum cooling .......................... 134
Notes on using the automatic cli-
mate control .................................. 131
Overview of systems ..................... .1 25
Problem with the rear window
defroster ........................................ 135
Problems with cooling with air
dehumidification ............................ 132
Rear control panel ......................... 127
Rear control panel (3-zone auto-
matic climate control with addi-
tional rear-compa rtment climate
control
) .......................................... 129
Refrigerant ..................................... 391
Refrigerant filling capacity ............. 392
Setting the air distribution ............. 133
Setting the air vents ..................... .1 36
Setting the airflow ......................... 133
Setting the climate mode (AIR
FLOW) ............................................ 132
Setting the temperature ................ 132
Switching air-recirculation mode
on/off ............................................ 135
Switching on/off ........................... 131
Switching residual heat on/off ...... 135
Switching the rear window
defroster on/off ............................ 134 Index 7

Rear seats
Adjusting ....................................... 101
Display message ............................ 277
Rear view camera
Cleaning instructions ..................... 334
Display in the multimedia system .. 200
Function/notes ............................. 199
Switching on/off ........................... 200
Rear window defroster
Problem (malfunction) ................... 135
Switching on/off ........................... 134
Rear window wiper
Replacing the wiper blade .............. 124
Switching on/off ........................... 123
Rear-view mirror
Anti-glare (manual) ........................ 110
Dipping (automatic) ....................... 112
Reflective safety jacket .................... 338
Refrigerant (air-conditioning sys-
tem)
Important safety notes .................. 391
Refueling
Fuel gauge ....................................... 37
Important safety notes .................. 155
Refueling process .......................... 156
see Fuel
Remote control
Garage door opener ....................... 321
Replacing bulbs
General notes ................................ 120
High-beam headlamps ................... 121
Important safety notes .................. 120
Installing/removing the cover
(front wheel arch) .......................... 121
Low-beam headlamps .................... 121
Overview of bulb types .................. 120
Turn signals (front) ......................... 122
Reporting safety defects .................... 32
Rescue card ......................................... 32
Reserve (fuel tank)
see Fuel
Reserve fuel
Display message ............................ 263
Warning lamp ................................. 288
Residual heat (climate control) ........ 135
Restraint system
Display message ............................ 256
Introduction ..................................... 44 Warning lamp ................................. 287
Warning lamp (function) ................... 45
Reversing feature
Panorama sliding sunroof ................ 93
Roller sunblinds ............................... 95
Side windows ................................... 89
Sliding sunroof ................................. 93
Tailgate ............................................ 85
Reversing lamps ( display mes-
s
age) ................................................... 260
Roadside Assistance (breakdown) .... 29
Roller sunblind
Panorama roof with power tilt/
sliding panel ..................................... 94
Rear side windows ......................... 310
Roof carrier ........................................ 308
Roof lining and carpets (cleaning
guidelines) ......................................... 337
Roof load (maximum) ........................ 392
Route (navigation)
see Route guidance (navigation)
Route guidance
see also Digital Operator's Man-
ual .................................................. 292
Route guidance (navigation) ............ 237
Route guidance active ...................... 238
S
Safety
Children in the vehicle ..................... 59
see Occupant safety
see Operating safety
Safety system
see Driving safety systems
SD card
Inserting ........................................ 298
Inserting/removing ........................ 298
Removing ....................................... 298
SD memory card
see also Digital Operator's Man-
ual .................................................. 292
Selecting ........................................ 239
Search & Send
see also Digital Operator's Man-
ual .................................................. 292
Seat
Correct driver's seat position ........... 9718
Index

The coolant is a mixture of water and anti-
freeze/corrosion inhibitor. It is responsible for
the following: R
anti-corrosion protection R
antifreeze protection R
raising the boiling point
If the coolant has antifreeze protection down to
-35 ‡ (-37 †), the boiling point of the coolant
during operation is approximately 266 ‡
(130 †).
The antifreeze concentrate/corrosion inhibitor
concentration in the engine cooling system
should: R
be at least 50%. This will protect the engine
cooling system against freezing down to
approximately -35 ‡ (-37 †). R
not exceed 55% (antifreeze protection down
to -49 ‡[ -45 †]) . Otherwise , hea t will no t be
dissipated as effectively.
Mercedes-Ben z recommends an antifreeze/
corrosion inhibitor concentrat e in accordance
wit h MB Specification s fo r Servic e Products
310.1.
i Whe n th e vehicle is first delivered, it is filled
wit h a coolan t mixture that ensures adequat e
antifreez e an d anti-corrosio n protection .
i The coolan t is checke d at specifie d intervals
at a qualifie d specialis t workshop .
Filling capacities Model Capacity
Mercedes ‑ AMG
vehicles Approx . 11.9 US qt
(11. 3 l)
GLS 350 d 4MATIC
Approx . 12.2 US qt
(11. 5 l)
GLS 550 4MATIC
Approx . 12.0 US qt
(11. 4 l)
All other models
Approx . 10.3 US qt
(9.7 l) Windshield washer syste m
Importan t safet y notes
G WARNING
Windshield washer concentrat e could ignit e if
it come s into contact wit h hot engin e compo-
nent s or th e exhaus t system. There is a ris k of
fir e an d injury.
Mak e sur e that no windshield washer con-
centrat e is spilled next to th e filler neck .
! Only MB SummerFit an d MB WinterFit
washer fluid should be mixed together . The
spray nozzles may otherwise becom e
blocked.
Do no t use distilled or de-ionized water . Other -
wise , th e level sensor may giv e a false reading.
Whe n handlin g washer fluid, observe th e impor -
tant safet y note s on servic e products
( Y
page 386).
At temperature s abov e freezing:X
Fill th e washer fluid reservoir wit h a mixture of
water an d windshield washer fluid, e.g. MB
SummerFit .
Ad d 1 par t MB SummerFit to 10 0 parts water .
At temperature s below freezing: X
Fill th e washer fluid reservoir wit h a mixture of
water an d washer fluid, e.g. MB WinterFit .
Fo r th e correc t mixin g ratio refe r to th e infor-
mation on th e antifreez e reservoir.
i Ad d windshield washer fluid, e.g. MB Sum -
merFit or MB WinterFit , to th e washer fluid all
year rou nd.
Climat e contro l syste m refrigerant
Important safety notes The climate control system of your vehicle is fil-
led with refrigerant R ‑ 134a.
The instruction label regarding the refrigerant
type used can be found on the radiator cross
member.
! Only the refrigerant R ‑ 134a and the PAG oil
approved by Mercedes-Benz may be used.
The approved PAG oil may not be mixed with
any other PAG oil that is not approved forService products and filling capacities 391
Technical data Z